Friction shock-absorbing mechanism



' 1,555,628 A. M. BRENNE K FRIGTION SHOCK ABSORBING MEGHANISM- Filed Nov. 2 1922 .i Patented Sept. 29, 1925. v 'l UNITED STATES PATENT?. oFI-ICEQV BILD n. BB1-:Nunen CHICAGO, runners, Missionen, BY MESNE ASSIGNMENTS, To

w. n. EINER., TNC., AcoaPonArIoNor DELAWARE.

Applioationmed November 2, 1922. Serial No. 598,519. y

'A To all whom it concern.

Be it known that I, Annan M. BRENNE, a

v citizen of the United States, residing at Chicago, in the county of Cook and State ofL la friction shock absorbing mechanism of that vtype characterized by a wedging means having keen angle eilect in compression and blunt angle edect in release and wherein means are employed to insure the proper contact of all co-acting wedge faces.

A s ecic object of the invention is to provi e a mechanism of the character indicated in the receding paragraph wherein a cylindrical s ell is em loyed with a circularly arranged serieso shoes and a wedge cooperable therewith in combination withl means between the wedge and shoes auto# -matically insuring proper and e effective action of the wedge during a compression stroken In the drawing forming a part. of this specification, Figure 1 is a horizontal longitudinal sectional view of a portion of a railway draft rig ing with the qualification that the section t proper corresponds to the section made by two intersecting-planes at 120 to each other.

Figure 2 isa vertical transverse sectional view of the yshockl absorbing mechanismproper taken on the line 2--2 of Fivure 1. igure 3 is a 1an view of oneof the firiction shoes., And igure 4 is a broken `vertical sectional view corresponding substantially and wit to the line '1-4 of Figure 1.

1n said drawing, 10-10 denote channel draft sills of a car under-frame,"to` the inner .faces of which are secured front stop lags 11 and rear stop lugs 12, A portion of a draw-bar is indlcatedat 13 to which is operativel aconnected a hooded cast yoke 1d sorbin mechanism pro r, hereinafter describe and a front fol ower 15 The yoke and parts therewithin'rare supported in oprough the friction elementswhich `is mounted the shock aberative position by a detachable saddle plate 16. l v

The friction shock absorbing mechanism roper, as shown, comprises Va combined friction shell and'springcage casting A; a spring resistance B; two like friction shoes .G-C and a third friction shoe D; a pressure-transmitting wedge E; two like wedge y elements F-F; a third corresponding element G; a spring follower H; and a retainer bolt J. s n

The casting A is of cylindrical form having a friction shell section proper 17 formed atits outer end-and, rearwardly thereof. a spring cage or casing 18. '.lhe casting Alias a rear integral wall 19 cooperable with the rear stop lugs 12. The shell 17 is formed on the inner side thereof with inwardly slightly converged friction surfaces 20, the

same preferably corresponding to portionsl of three cylindrical surfaces, as best shown in Figure The three friction shoes C and D are arranged in a circular series, each of said shoes having an outer cylindrical., friction surface 21 cooperable with one of the corresponding cylindric shell surfaces. The two like .shoes C are provided on their inner sides with vconcave depressions 22, eachcorresponding to a section of a sphere, the center line of which lies in a plane perpendicular to the opposed wedge face of the wedge E and passing through the longitudinal axis of the mechanism. The shoe D is similarly provided with a concavevbearing 23, the center Aof whiclr' lies in a plane passing vthrough the longitudinal axis of the niech- A anism perpendicular to the corresponding opposed face of the wedge E which, as hereinafter explained, extends at a diderent angle to the axis of the mechanism than those faces of .thegwedge which are opposite the shoes C.

The s rin follower H is of cup-shape, having caring. on the inner ends of the shoes C and D and also on the inwardly extended pro'ections ther-cof, which are prcvided for t e said bearings 22 and 23. 'lhe spring B is liunterposed between said follower ll andthe rear wall of the casting A.

The wedge 'E is in the form of a preferably cast b ook having an outer flat transverse face 24 bearing upon the follower 15.

Miti@ with two wedge faces 25--25 and a third face 26, all converged toward the inner end of the wedge block E.

of the shell. Said three faces 25 and 26 are arranged at 60 to each other, the two faces 25-25 extending at a relatively .acute angle with respect to the axis. of the mechanism. The other -face 26 extends at a relatively blunt and true releasing angle with respect to the axis of the mechanism.

The three elements F and` G are of similar character, each lbeing provided on its outer side with a convex or spherical bearing face 27 and on its'inner side with a flat face 28. As will be'understood, the two elements F have their spherical outerffaces and inner wedge faces 27 made to correspond with the two shoes C and the wedge faces 25 of the block E and the other [element Gr is made to cooperate with the bearing face 23 of the shoe D and the inclined blunt angle face 26 The retainer bolt J is anchored at its rear end within a hollow boss formed on 'the casting A and at its forward end within a suitable recess in the wedge E, the latter and the follower I-I beingsuitably apertured to accommodate the shank of the bolt.

The operation of the mechanism, assum-\ ing a compression stroke under buff, is as follows. A s the wedge E is forced inwardly of the shell, the true wedging or spreading action is set up on the two wedge faces 25 cooperating with` the two wed e elements F and through the latter with t e shoes C, it being understood that there will be an equal reaction from the op osed shoe D acting through the element The lcapacity produced will therefore be infaccordance'with the acuteness of the angle of the wedge faces 25. Inl release, upon discontinuance of the actuating force, thev wedge E will readily disengage itself from the element G on account of the blunt releasing angle of the cooperating faces 26 and 28, thus permitting colla se of the friction unit and allowing all o the parts to be projected outwardly to their normal full release position.

With my-arrangement, the three elements F and G willl automatically provide for an necessary vadjustment between the wedge and the three shoes to compensate for any ,variations which may occur in either the angle between any two vfaces of the wedge considered in cross section as shown in Figure 2 or in the angle which any one, of said .faces may make with respect tothe axis of the mechanism. This insures true and full surface contact between the faces of vthewedge E and the elements F and G and also will-take care of any tilting or skewing'of the wedge E which may occur by reason of an eccentric blow being delivered 'to the mechanism. Furthermore, .the v slight differential action which occurs by reason of the lments cooperable with sai taper of the shell' will be com ensated for by adjustment'of the elements and G with respect to their corresponding bearing surfaces on the wedge E. By em loying three distinct sections of cylindricai) surfaces on the interior of the shell, full surface contact between the shoes and shell, in all relative positions thereof, will be maintained. l

I have herein shown 'anddescribed what I now consider the preferred manner of carrying out the invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. In a friction shock absorbing mechanism, the combination with a friction shell having interior friction surfaces; of a spring resistance; a p luralit of friction eleshell; a pres-4 sure-transmittin element extending between said friction elements; and a'plurality ofmembers interposed between said pressure-transmitting element and said friction elements, one member cooperating with each friction element, each of said members having a ball face on one side and a flat. face on the other side inclined with respect to the axis ofthe mechanism, the elements being provided with cooperating faces for said members.

3. In a friction shock absorbing mechanism, the combination with a friction shell having interior friction y surfaces; of Aa spring resistance; a plurality of friction shoes cooperable with said shell; a pressuretransmitting element extending lbetween said friction shoes; and a` plurality of `members interposed between said pressure-transmittin element and said friction shoes, each of sai Amembers havin a ball'face cooperable with a correspondingly curved -face on4 4.' In a friction shock absorbing `mechalnism, the combination with a friction shell having interior friction surfaces; of ya spring resistance; a plurality of friction l shoes cooperable with said shell; a pressuretransmitting element extending between said friction shoes; and a plurality of members interposed between said pressure-transmitting element and each of said friction shoes, each of said members having a ball Kface cooperable with a correspondingly at curved face on the shoe and an inner face cooperable with a corresponding lat face on the pressure-transmittmg element, all of said iat bearing faces extending at an angle to the axis ofthe shell and toward the inner end thereof, the angle of inclination of some of said faces differing from the angle of others.

5. In a friction. shock absorbing mechanism, the combination with a frictlon shell;

of a spring resistance; a plurality of fricp tion shoes cooperable with the interior 'of disposed pressure-transmitting wedge having three faces o n the inner end thereof con- ;'verged inwardly of the shell; and compensating elements interposed between said faces of the wedge and each of the shoes, `each ofsaid elements having a Hat face engaging with a face of the wedge' and an outer convex bearing face cooperable with a corresponding concave face on the shoe.

7. In a friction shock absorbing mechanism, the combination with a cylindrical friction shell; of a sprin resistance; a circularly arranged series o friction shoes cooperable with the shell, each of said shoes having a concave bearing surface on its inner side; a centrally disposed pressuretransmitting wedge having, at its inner end,

f two wedge faces inclinedat a relatively acute angle with respect to the axis of the day of October, 1922.

shell and a third face inclined at a relatively blunt angle with respect to said axis; and a compensating element interposed between each shoe and a corresponding opposed face of the Wedge, each of said elements having an outer convex surface and an inner ilat surface.

8. In a friction shock -absorbing mechanism, the combination with a friction shell; of a spring resistance; a series of friction shoes oooperable with the shell and arranged symmetrically around the axis thereof; a centrally disposed pressure-transmitting member, said member and each shoe having an opposed set of faces, each set comprising` y a Hat face and a concave face curved longitudinally of the mechanism and with a-ll of said sets converged inwardly of the shell; and an adjusting member interposed between and cooperating with each set of said.

faces only. v

9. In a friction shock absorbin mechanism, the combination with a cylin ric friction shell; of a series of three friction shoes cooperablepwith theshell and arranged oircularly; a spring resistance; a pressuretransmitting member havin three fiat faces all converged inwardly of t e shell and disposed around the axis thereof, at least one of said faces extending at an angle different lfrom any other with respect to said axis;

and means interposed between each of said faces and the corresponding friction shoe.

10. In a friction shock absorbing mechanism, the combination with a friction shell having interior cylindric friction surfaces; of a spring resistance; three friction shoes arranged' in a circular series and cooperable.

with said shell; a pressure-transmittin member having two faces thereof incline inwardly of the shell toward the axis thereof at an acute wedging angle, said member having also a third face inclined toward the axis and inner end of the shell but at a relatively blunt angle with respect to the axis; and pressure-transmitting means interposed between each of said faces and the corresponding friction shoe.

In witness that I claim the foregoing have hereunto subscribed my name this 6th ARILD M. BRENNE. 

